Abstract
Miniaturized implanted circuits must be autonomous, harvesting energy from surroundings or receiving power from an inductive link. Considering the latter, when the implant dimensions are limited to few mm $^2$ , the power receiver must be carefully designed so that its efficiency is maximized. If the receiving inductor is integrated in a silicon substrate, a rigorous design methodology should be adopted, because the losses are high, thus degrading the power transmission efficiency. An additional issue arises when such a system needs to be tested, which must happen without invasive techniques. In this article, we describe the contactless characterization of an LC resonator used in an 1.5 mm $\,\times\,$ 1.5 mm fully integrated wireless power receiver. A quality factor of 20.8 was measured at the resonance frequency 0.99 GHz.
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